Thanks for your comments!
I mixed up 22 oz of the starch ( one heaping tablespoon cornstarch, 20 oz water and added lemon juice). I used it on a pieced border this afternoon in a spray bottle that another brand of starch came in.
So far, I am really liking this. My mixture was not meant to be a heavy starch but more than a sizing. I did not have any problems with flaking. I lightly sprayed the fabric so that it was not saturated.
I read recently that the flaking of starch was because of improper temperature of the iron. And that's all I know about that....have not experimented with this theory.
Bottom line: unless I can find reason not to use the cornstarch recipe then I have found a great and inexpensive store bought starch!